<template>
  <a-layout>
    <a-layout-content
      :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
    >
      <p>
        <a-form :model="param" layout="inline">
          <a-form-item>
            <a-input v-model:value="param.name" placeholder="名称" size="large"/>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="handleQuery({page: 1, size: pagination.pageSize})" size="large">
              查询
            </a-button>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="add()" size="large">
              新增
            </a-button>
          </a-form-item>
        </a-form>
      </p>
      <a-table
        :columns="columns"
        :row-key="record => record.id"
        :data-source="ebooks"
        :pagination="pagination"
        :loading="loading"
        @change="handleTableChange"
      >
        <template #cover="{ text: cover }">
          <img v-if="cover" :src="cover" alt="avatar"/>
        </template>
        <template v-slot:category="{ text, record }">
          <span>{{ getCategoryName(record.category1Id) }} / {{ getCategoryName(record.category2Id) }}</span>
        </template>
        <template v-slot:action="{ text, record }">
          <a-space size="small">
            <router-link :to="'/admin/doc?ebookId=' + record.id">
              <a-button type="primary">
                文档管理
              </a-button>
            </router-link>
            <a-button type="primary" @click="edit(record)">
              编辑
            </a-button>
            <a-popconfirm
              title="删除后不可恢复，确认删除？"
              ok-text="是"
              cancel-text="否"
              @confirm="handleDelete(record.id)"
            >
              <a-button type="primary" danger>
                删除
              </a-button>
            </a-popconfirm>
          </a-space>
        </template>
      </a-table>
    </a-layout-content>
  </a-layout>
  <a-modal
    title="电子书表单"
    v-model:visible="modalVisible"
    :confirm-loading="modalLoading"
    @ok="handleModalOk"
  >
    <a-form :model="ebook" :label-col="{ span: 6 }" :wrapper-col="{ span: 18 }">
      <a-form-item label="封面">
        <a-input v-model:value="ebook.cover" />
      </a-form-item>
      <a-form-item label="名称">
        <a-input v-model:value="ebook.name" />
      </a-form-item>
      <a-form-item label="分类">
          <a-cascader v-model:value="categoryIds"
                      :field-names="{ label: 'name', value: 'id', children: 'children' }"
                      @change="searchCascader"
                      :options="level1" />
      </a-form-item>
      <a-form-item label="描述">
        <a-input v-model:value="ebook.description" type="textarea" />
      </a-form-item>
    </a-form>
  </a-modal>
</template>

<script lang="ts">
  import {defineComponent, onMounted, ref} from 'vue';
  import axios from 'axios';
  import {message} from "ant-design-vue";
  import {Tool} from "@/util/tool";

  export default defineComponent({
    name: 'AdminEbook',
    setup() {
      const param = ref()
      param.value = {}
      const ebooks = ref();
      const pagination = ref({
        current: 1,
        pageSize: 10,
        total: 0
      });
      const loading = ref(false);

      const columns = [
        {
          title: '封面',
          dataIndex: 'cover',
          slots: {customRender: 'cover'}
        },
        {
          title: '名称',
          dataIndex: 'name'
        },
        {
          title: '分类',
          slots: { customRender: 'category' }
        },
        {
          title: '文档数',
          dataIndex: 'docCount'
        },
        {
          title: '阅读数',
          dataIndex: 'viewCount'
        },
        {
          title: '点赞数',
          dataIndex: 'voteCount'
        },
        {
          title: 'Action',
          key: 'action',
          slots: {customRender: 'action'}
        }
      ];

      /**
       * 数据查询
       **/
      const handleQuery = (params: any) => {
        loading.value = true;
        axios.get("/ebook/list", {
          params: {
            page: params.page,
            size: params.size,
            name: param.value.name
          }
        }).then((resp) => {
          loading.value = false;
          const data = resp.data;
          if (data.success) {
            ebooks.value = data.content.list;

            // 重置分页按钮
            pagination.value.current = params.page;
            pagination.value.total = data.content.total
          } else {
            message.error(data.message);
          }
        });
      };

      /**
       * 查询所有分类
       **/
      const level1 = ref()
      let categories: any
      const handleQueryCategory = () => {
        loading.value = true
        axios.get("/category/all").then((resp) => {
          loading.value = false
          const data = resp.data
          if (data.success) {
            categories = data.content
            level1.value = []
            level1.value = Tool.array2Tree(categories, 0)

            // 加载完分类后，再加载电子书，否则如果分类树加载很慢，则电子书渲染会报错
            handleQuery({
              page: 1,
              size: pagination.value.pageSize
            })
          } else {
            message.error(data.message);
          }
        })
      }

      const getCategoryName = (cid: number) => {
        let result = ""
        if (cid !== null) {
          categories.forEach((item: any) => {
            //  后端为了前端不丢失Long类型精度，把id以String类型返回给前端，所以id是String
            if (item.id === cid.toString()) {
              result = item.name
            }
          })
        }
        return result
      }

      /**
       * 表格点击页码时触发
       */
      const handleTableChange = (pagination: any) => {
        handleQuery({
          page: pagination.current,
          size: pagination.pageSize
        });
      };

      // ---------- 表单 -----------
      const categoryIds = ref()
      const ebook = ref()
      const modalVisible = ref(false)
      const modalLoading = ref(false)
      const handleModalOk = () => {
        modalLoading.value = true
        if (categoryIds.value !== undefined) {
          ebook.value.category1Id = categoryIds.value[0]
          ebook.value.category2Id = categoryIds.value[1]
        }
        axios.post("/ebook/save", ebook.value).then((resp) => {
          modalLoading.value = false
          const data = resp.data
          if (data.success) {
            modalVisible.value = false

            // 重新加载列表
            handleQuery({
              page: pagination.value.current,
              size: pagination.value.pageSize
            })
          } else {
            message.error(data.message)
          }
        });
      }

      /**
       * 编辑
       */
      const edit = (record: any) => {
        modalVisible.value = true
        ebook.value = Tool.copy(record)
        // 解决级联选择器数据初始渲染问题
        // category1Id为int，后端给前端的id是String
        if (ebook.value.category1Id !== null) {
          categoryIds.value = [ebook.value.category1Id.toString(), ebook.value.category2Id.toString()]
        }
        // categoryIds.value = [ebook.value.category1Id.toString(), ebook.value.category2Id.toString()]
        console.log('categoryIds.value ===== ' + categoryIds.value)
      }

      /**
       * 新增
       */
      const add = () => {
        modalVisible.value = true
        ebook.value = {}
      }

      /**
       * 删除
       */
      const handleDelete = (id: string) => {
        console.log('==========================' + id)
        axios.delete("/ebook/delete/" + id).then((resp) => {
          const data = resp.data
          if (data.success) {
            // 重新加载列表
            handleQuery({
              page: pagination.value.current,
              size: pagination.value.pageSize
            })
          }
        })
      }

      const searchCascader = () => {
        console.log('=========' + categoryIds.value)
      }

      onMounted(() => {
        handleQueryCategory()
      })

      return {
        ebooks,
        categoryIds,
        pagination,
        columns,
        loading,
        param,
        level1,
        handleTableChange,
        handleQuery,
        handleQueryCategory,
        getCategoryName,

        ebook,
        modalVisible,
        modalLoading,
        edit,
        add,
        handleModalOk,
        handleDelete,

        searchCascader
      }
    }
  });
</script>

<style scoped>
  img {
    width: 50px;
    height: 50px;
  }
</style>
